Improvement in valve-gears



waited tat-ee aient demini,

WILLIAM R. REECE, OF TREMONT, PENNSYLVANIA, ASSIGNOR TO HIMSELF AND THEv IRON MANUFACTURING AND COAL COMPANY, OF SAME PLAGE. i

Letters retenant. 110,935, dared January 1o', 1871.

IMPRovEMENT 1N VVALVE-cannes.

The cnedule referred to in these .Letters Patent and making part of the same,

To all 'whom it may concer-n Be it known that I, WILLLIM R. RnEeJanof Tremont, in the county of Schuylkill and State of ,Pennsylvania,l1ave invented a new and improved Valve- Gear; and I do hereby declare that the following is a full,clear, and exact description thereof, which will Y' enable others skilled in theart to make and` use the same, referencebeing had to the accompanying drawing forming part of this specification.

The drawing represents a side view of my improved valve-gear. 5 v c This inventionhas for its object so to construct the. mechanism for operating a slidefvalve that the valve will be slowly closed,qnickly opened, Aand allowed to remain stationary ashort time when closed, so as to -fully utilize the force ofthe expanding steam.`

The invention consists in theuse of a three-pointed 0r T-shaped rock-arm for moving Vthe'val've-rod, the said arm, by striking the box ends of the rod with its several points, serving to impart the varying'motion, as required. l

A in the drawing represents the crank or rack-arm for moving the valve-rod B, with-which the slide-valve C, of suitable kind, is connected.

The arm A works between two vertical plates, a and b, that project from the valve-rod, forming the box c, which the rock-arm operates.

The latter is somewhat in shape like aninverted Duringr the return stroke of the arLn A the point eY will strike the plate b and slowly close the valve, when the shank-f will, after a short stationary period of the valve', again quickly open the same. The steam is thus allowed fnll time to enter the cylinder, and also to act expansivelywithin the saine, but is rapidly exhausted and the dead center readily overcome. Having thus described `my invention,

I claim as new and desire to secure by Letters Patent- Ihe rock-arm, having the points l aand shank f, working between the plates a b ol the valve-rod to vary the motion of the valve, substantially as herein shown and described.

' WILLIAMl B REECE. Witnesses:

JOSEPH Bnownn, GEO. W. GARRETT. 

